Tool-holder.



PATENTED NOV. 20, 1906.

G. J. PANGHER.

TOOL HOLDER.

APPLICATION FILED JAN.8.1906.

h f 640 c L. J H

. SHOT/"e1 4 UNITED STATES PATENT OFFICE.

CHARLES J. FANCHER, OF WEST GRANBY, CONNECTICUT, ASSIGNOR TO THE SIMPLEX MANUFACTURING COMPANY, OF NEW YORK, N. Y., A

CORPORATION OF CONNECTICUT.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Nov. 20, 1906.

. Application filed January 8, 1906. Serial No, 294,985.

, vented a new and useful Tool-Holder, of

which the following is a specification.

My invention relates to improvements in devices for holding tools, particularly files, in a filing-machine or the like, in which the tooloperating plunger is bored and slotted at the base and a collar is provided which is adapted to fit onto such plunger and has securing means for the tool and means whereby the collar itself can be tightly fastened to said plunger and released therefrom, all as hereinafter set forth. By preference a number of collars are provided with each machine or with the plunger thereof, for reasons which will be stated in due course.

I prefer to employ in the bore of the plunger a yielding centering-piece for the end of the tool which enters said bore, although such a device is not an absolute essential to the success of my invention, and I am aware that yielding centering-pieces are not in and by themselves new.

The object of my invention is to provide means for quickly and easily attaching a tool to and detaching it from the plunger which is designed to operate the same.

It is very convenient and often quite desirable to be able to change quickly from one tool to anotherin tool-operating machines, such as filing-machines, and I make provision for this by affording means for fastening the tool to a collar which fits the machine-plunger and which can be readily placed thereon and removed therefrom with the tool still connected With said collar. With this device after the tool has been properly secured to or connected with the collar the manipulation of only one member is required to attach said tool through the medium of said collar to theplunger or detach it therefrom, which efiects a considerable saving in time,

labor, and energy, especially when a plurality of collars is provided, since the operator can connect the different tools which are likely to be employed with an equal number of collars beforehand and leave them ready for instant use when the time comes for each.

It will be understood that it is much easier to fasten the tool and collar together than it would be to fasten the tool directly to the plunger, as has been done heretofore, whereby a further saving is effected as a result of this invention.

A further object is to afford means for eX- peditiously and readily turning the tool when worn to present a fresh side to the work.

I attain the objects and secure the advantages above pointed out by the means illustrated in the accompanying drawings, in which Figure 1 is an isometric view of a plunger adapted to form part of my invention; Fig. 2, a bottom view of said plunger; Fig. 3, an isometric view of the associated collar detached; Fig. 4, an isometric view of said collar detached with a portion of a file'connected therewith; Fig. 5, a side view of the parts assembled and a file held in operative position thereby, only the lower terminal of the plunger and the upper terminal of the file being shown, as in Figs. 1 and 4; Fig. 6, a vertical section through the assembled members; and

Fig. 7, a similar section, except that the centering-piece is shown in elevation, taken at right angles to the preceding view.

Similar letters designate similar parts throughout the several views.

' In Fig. 1, a represents a sleeve or bearing or the bottom part thereof for a tool-operating plunger, which is adapted to reciprocate throu h said sleeve or bearing, that portion of suc plunger which is designed to hold the tool that is, the lower termmalbeing rep resented at l) in this and other views. The sleeve a and plunger 6, with the exception of the required change in the latter fully described below, correspond with what may be seen in either of the applications for United States Letters Patent filed by me on the 22d day of April, 1904, (Serial No. 204,406,) and the 10th day of April, 1905, (Serial N 0. 254,707,) respectively, the first being for a machine for operating abrading or cutting tools and the second for driving mechanism for abrading or cutting tool-operating machines, to which the present invention is particularly applicable, although it may be ems:

ployed to advantage in other machines or mechanisms for a more or less similar purare turned inward until their inner ends conpose. In the base of the plunger 6 1s a centact with opposite sldes of sald tang, when tral longitudinal passage or bore 0 and two oppositely-disposed slots d, the latter being new, While the former is old. The bore 0 is adapted to receive the upper end of the tool, a file in the present case, and the slots (Z are for the accommodation of certain set-screws in the collar presently to be described. The shape of the bore 0 or of the walls and top thereof, one or both, may vary to meet dif ferent conditions; but in the present inis ltance such walls are cylindrical and the top Within the bore 0 is a block or centeringpiece 6, having its base recessed at e to receive the upper end of the tang of the file. The recess a, or at least the outer portion thereof, is made flaring or tapering, and the open end or mouth of such tapered ortion is of the same size as the bore 0, so t ere is no shoulder for the end of a tool entering said bore to strike against; but, on the contrary, the entering part of the tool is guided by the tapering sides of said recess directly to the center of the centering-piece e, thus obviating any liability to fasten the tool in place with its engaging end out of center. The centering-piece e is adapted to slide up and down in the bore 0 within the limits determined by a spring f, interposed between the top of said centering-piece and the top of said bore. The upper terminal f of the spring f is of greater diameter than the rest of said spring and of such size that it fits tightly within the upper end of the bore a and is there held and in turn supports the centering-piece e, to which the bottom of the spring is fastened at e by frictional contact. The spring f supports the centering-piece e, as stated, and also affords a tension above the same, so that said centering-piece not only serves as a guide for the tang, but affords some support for the file, the amount of such support depending upon the strength of the spring. This yielding centering-piece accommodates itself to files of different lengths, as will be readily understood.

With the plunger b I employ a collar g, constructed and arranged .to fit onto the same, and I provide such collar with two oppositelydisposed set-screws 7L, designed to grasp, center, and securely hold the tang i of a file j, and with a third set-screw 76, adapted to fasten said collar in place on the plunger, there being by preference two oppositely-disposed external indentations Z in the plunger, in either of which the inner end of said set-screw k may be seated. All of the set-screws pass through threaded openings in the sides of the collar. It is the set-screws h which are received into the slots din the plunger.

In practice the file-tangi is passed through the collar 9, with its upper terminal extcrding above such collar, and the set-screws it said set-screws are tightened so as to hold the tang securely in place in said collar. Generally the set-screws h are so adjusted, before being tightened against the tang i, as to position the file approximately in line with the vertical center of the collar gthat is, so as'to cause the vertical center of the file, with its tang, to coincide with the corresponding center of said collar; but it will be readily seen that there is nothing to hinder locating the file out of its central position should it be desirable to do so for the purpose of accommodating the same to some part of the machine, or to the work, or for any other reason. Now all that is necessary in order to attach the file to the plunger b is to slip the collar g onto said plunger, with the upper terminal of the tang in the bore 0 and the set-screws h in the slots d, and tighten the set-screw 7c against the adjacent side of the plunger, the inner end of said set-screw lc being of course in one of the indentations Z. When the tang i enters the bore 0, its upper end encounters the recessed part of the centering-piece e, and both tang and centering-piece are forced upward against the resiliency of the spring f until the collar 9 is in position with its set-screw 7c in alinement with one of the indentations Z. Then saidset-screw is tightened, and the file is held securely, ready for and durin operation. To reverse the collar and fi e or remove the same, simply loosen the set-screw 7c, then either turn the parts and seat said setscrew in the other indentation Z or remove said parts from the plunger altogether. In reversing the collar and file it is necessary after loosening the set-screw 7c to draw down the collar until the set-screws h clear the slots d before turning, and then after turning to ,file after being once properly attached to a collar need not be removed therefrom, perhaps, until worn out, although used only at more or less infrequent intervals.

I wish to include in my invention whatever alterations justly fall within the scope of my claims.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a tool-holder, with a plunger bored and slotted at the base, of a collar provided with set-screws adapted to being arranged to receive said first-mentioned set-screws.

In testimony whereof I have signed my fasten a tool in place therein, and means to secure said collar to said plunger, the slots in the latter being arranged to receive said setscrews. name to this specification in the presence of 5 2. The co1nbination,in a tool-holder, with l two subscribing witnesses.

a plunger bored and slotted at the base, of a CHARLES J FANCHER collar provided with set-screws adapted to fasten a tool in place therein, and another Witnesses:

set-screw in said collar adapted to secure the LUOIAN REED, 10 same to said plunger, the slots in the latter 1 P. M. REED. 

